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Analysis of mixed convection in an inclined square cavity using nanofluids with Vajjha and Das' nanofluid model
Author(s) -
Shamadhani Begum A.,
Chamkha Ali J.
Publication year - 2021
Publication title -
heat transfer
Language(s) - English
Resource type - Journals
eISSN - 2688-4542
pISSN - 2688-4534
DOI - 10.1002/htj.22099
Subject(s) - nanofluid , heat transfer , materials science , mechanics , combined forced and natural convection , finite volume method , thermal conductivity , flow (mathematics) , volume fraction , viscosity , richardson number , thermodynamics , convection , thermal , natural convection , physics , composite material , buoyancy
In this article, the effects of angle of inclination on heat transfer by mixed convection have been analyzed numerically in a square cavity packed with a CuO nanofluid. Cavity boundaries are constructed by having sinusoidal varying temperature on sidewalls, inactive horizontal walls, and the hot passing plate at the center of the cavity. The transport equations for fluid and heat are solved using the finite‐volume method with SIMPLE algorithm. The Richardson number ( Ri ) varying from 0.01 to 100, inclination angle ( γ ) from 0° to 90°, wall speed ratios ( λ ) from 0 to 3 and volume fraction of nanoparticles ( φ ) from 0.0 to 0.1 are given and represented in the form of flow fields, temperature fields, and mean heat transfer graphs. It is detected that the principal flow constraints have a substantial impact on the flow lines and thermal lines. Specifically, the structures of cavity inclination, existence of copper nanoparticles, and the hot wall in motion at the midpoint of the cavity are established to enrich the overall rate of heat transfer. Correspondingly, in the present study, the Vajjha and Das model is taken into account for the effective thermal conductivity and viscosity of the nanofluid; application of this model is beneficial for the industries working in a high‐temperature environment.